/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package controller;

import java.io.IOException;
import java.io.PrintWriter;
import javax.ejb.EJB;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import model.*;

/**
 * Controller for Logging In
 * @author Mickey
 */
@WebServlet(name = "LoginServlet", urlPatterns = {"/LoginServlet"})
public class LoginServlet extends HttpServlet {

    @EJB ListOfUsersBean listOfUsers;
    User user;
    @EJB PreviousPageBean previousPage;
    HttpSession session;
    
    /**
     * Processes the login request from index.jsp
     * Now it only matches to one username and password and navigates to the FarmerHome page,
     * otherwise it navigates back to the login (index) page
     * Eventually it will match for all Users and distinguish between Farmers and Admins
     * 
     * Processes requests for both HTTP
     * <code>GET</code> and
     * <code>POST</code> methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try{
            //user = new UserBean();
            // user.setUserID("farmerJoe");
            // user.setPassword("password1");
            // 
            String username = request.getParameter("username");
            String password = request.getParameter("password");
            user = listOfUsers.validateUser(username, password);
            if (user != null) {
                if (!user.isLocked()) {
                    if (user.getPassword().equals(password)) {
                        user.resetLoginAttempts();
                        session = request.getSession(true);
                        session.setAttribute("user", user);
                        if (user instanceof FarmerBean){
                            previousPage.setNext("FarmerHomeServlet");
                            response.sendRedirect(previousPage.getNext());
                        }
                        else {
                            previousPage.setNext("adminHome.jsp");
                            response.sendRedirect(previousPage.getNext());
                        }
                    }
                    else {
                        user.incrementLoginAttempts();
                        response.sendRedirect("indexBadLogin.jsp");
                    }
                }
                else {
                    response.sendRedirect("indexLocked.jsp");
                }
            }
            else {
                response.sendRedirect("indexBadLogin.jsp");
            }
            /*
             * TODO output your page here. You may use following sample code.
             
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet LoginServlet</title>");            
            out.println("</head>");
            out.println("<body>");
            out.println("<h1>Servlet LoginServlet at " + request.getContextPath() + "</h1>");
            out.println("</body>");
            out.println("</html>");
            * 
            */
        }
        finally {             
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
